Answer: When selecting a duct rodder, focus on the quality of its components. The rod should be made from a high-quality composite of E-fiberglass and a strong resin for superior tensile strength and flexibility. The outer coating should be high-density polyethylene (HDPE) for excellent durability and corrosion resistance. Look for a sturdy, rust-resistant steel frame with a wheel assembly for easy transport and a reliable braking system for rod control. A high-quality bull-nose pulling eye and other rustproof accessories are also crucial for a long-lasting tool.